B. The AWS account ID associated with your credentials
C. The list of all AWS regions
D. The current IAM user name
Solution
Step 1: Understand Get-STSCallerIdentity cmdlet
This cmdlet returns details about the AWS identity used, including the Account property.
Step 2: Analyze Select-Object usage
Select-Object with -ExpandProperty Account extracts and outputs only the AWS account ID string.
Final Answer:
The AWS account ID associated with your credentials -> Option B
Quick Check:
Get-STSCallerIdentity + Account property = AWS account ID [OK]
Hint: Get-STSCallerIdentity shows your AWS account info [OK]
Common Mistakes:
Expecting user name instead of account ID
Thinking it lists regions
Assuming command fails without credentials
4. You run this command but get an error: Get-S3Bucket is not recognized. What is the most likely cause?
medium
A. The S3 service is down
B. Your AWS credentials are incorrect
C. AWS PowerShell module is not imported
D. You need to restart PowerShell
Solution
Step 1: Understand error meaning
Error 'command not recognized' means PowerShell does not know the cmdlet, usually because the module is not loaded.
Step 2: Check other causes
Incorrect credentials or service downtime cause different errors; restarting PowerShell is rarely needed if module is imported.
Final Answer:
AWS PowerShell module is not imported -> Option C
Quick Check:
Cmdlet not recognized = module missing [OK]
Hint: Import AWS module before using its cmdlets [OK]
Common Mistakes:
Blaming credentials for cmdlet not found error
Assuming service downtime causes this error
Restarting PowerShell unnecessarily
5. You want to list all EC2 instances in the 'us-east-1' region using AWS PowerShell. Which command correctly sets the region and retrieves the instances?
hard
A. Set-DefaultAWSRegion -Region us-east-1; Get-EC2Instance
B. Get-EC2Instance -RegionName us-east-1
C. Set-AWSRegion us-east-1; Get-EC2Instance
D. Get-EC2Instance | Where-Object { $_.Region -eq 'us-east-1' }
Solution
Step 1: Identify how to set AWS region in PowerShell
The cmdlet to set default region is Set-DefaultAWSRegion with -Region parameter.
Step 2: Retrieve EC2 instances after setting region
After setting region, Get-EC2Instance fetches instances in that region. Set-DefaultAWSRegion -Region us-east-1; Get-EC2Instance correctly chains these commands.
Step 3: Evaluate other options
Get-EC2Instance -RegionName us-east-1 uses invalid parameter '-RegionName'; Set-AWSRegion us-east-1; Get-EC2Instance uses a non-existent cmdlet; Get-EC2Instance | Where-Object { $_.Region -eq 'us-east-1' } filters instances locally but region info is not a direct property.
Final Answer:
Set-DefaultAWSRegion -Region us-east-1; Get-EC2Instance -> Option A
Quick Check:
Set region first, then get instances [OK]
Hint: Set region with Set-DefaultAWSRegion before commands [OK]